The system that came to mind when I was writing this post was a DMP XR-500 system installed in an outboard motor plant. It handled the building’s fire alarms, provided access control/security, and had supervisory points to monitor the boiler systems, chillers, and other HVAC equipment. It just monitored their trouble contacts, it had no part in actually controlling the equipment. Sorry if that came across misleading :oops:
Here’s a partial list of the points on the system as an example. (The system is no longer active).
I think they originally installed this as a Radionics system in 1995. So you’re saying this would no longer be acceptable nowadays?